get img from page / article (wordpress)

slider.php

<?php 
$id = get_the_id();
$attachments = get_attached_media( 'image', $id );
if(empty($attachments)){
	?>
	<div class="slider" data-url=["http:\/\/lescaladaulemosi.fr\/wp-content\/uploads\/2015\/07\/home-compressor.jpg"]>
	</div>
	
	<?php
} else {

	$attachments = get_children(array('post_parent' => $post->ID,
                        'post_status' => 'inherit',
                        'post_type' => 'attachment',
                        'post_mime_type' => 'image',
                        'order' => 'ASC',
                        'orderby' => 'menu_order ID'));

	$array =[];

	foreach($attachments as $att_id => $attachment) {
	    $full_img_url = wp_get_attachment_url($attachment->ID);
	    // Your Code here
	    $array[] = $full_img_url;
	}

	$encodedImg =  json_encode($array);
	?>
	<script>
		var imgs = <?php echo json_encode($encodedImg) ?>;
	</script>
	<div class="slider" data-url=<?php echo $encodedImg ?>>
	</div>
	<?php
} ?>